void CommandAudioStartPos()
{
switch (CommandBuffer[9] & 0xC0)
{
case 0x00: // Set start offset in LBA units
audioStartLBA = (CommandBuffer[3] << 16) | (CommandBuffer[4] << 8) | CommandBuffer[5];
break;
case 0x40: // Set start offset in absolute MSF units
byte m = CommandBuffer[2].BCDtoBin();
byte s = CommandBuffer[3].BCDtoBin();
byte f = CommandBuffer[4].BCDtoBin();
audioStartLBA = DiscUtils.Convert_AMSF_To_LBA(m, s, f);
break;
case 0x80: // Set start offset in track units
byte trackNo = CommandBuffer[2].BCDtoBin();
audioStartLBA = disc.Session1.Tracks[trackNo].LBA;
break;
}
if (CommandBuffer[1] == 0)
{
pce.CDAudio.PlayStartingAtLba(audioStartLBA);
pce.CDAudio.Pause();
}
else
{
pce.CDAudio.PlayStartingAtLba(audioStartLBA);
}
SetStatusMessage(STATUS_GOOD, 0);
pce.IntDataTransferComplete = true;
}
void CommandAudioEndPos()
{
switch (CommandBuffer[9] & 0xC0)
{
case 0x00: // Set end offset in LBA units
audioEndLBA = (CommandBuffer[3] << 16) | (CommandBuffer[4] << 8) | CommandBuffer[5];
break;
case 0x40: // Set end offset in absolute MSF units
byte m = CommandBuffer[2].BCDtoBin();
byte s = CommandBuffer[3].BCDtoBin();
byte f = CommandBuffer[4].BCDtoBin();
audioEndLBA = DiscUtils.Convert_AMSF_To_LBA(m, s, f);
break;
case 0x80: // Set end offset in track units
byte trackNo = CommandBuffer[2].BCDtoBin();
if (trackNo - 1 >= disc.Session1.Tracks.Count)
{
audioEndLBA = disc.Session1.LeadoutLBA;
}
else
{
audioEndLBA = disc.Session1.Tracks[trackNo].LBA;
}
break;
}
switch (CommandBuffer[1])
{
case 0: // end immediately
pce.CDAudio.Stop();
break;
case 1: // play in loop mode. I guess this constitues A-B looping
pce.CDAudio.PlayStartingAtLba(audioStartLBA);
pce.CDAudio.EndLBA = audioEndLBA;
pce.CDAudio.PlayMode = CDAudio.PlaybackMode_LoopOnCompletion;
break;
case 2: // Play audio, fire IRQ2 when end position reached, maybe
pce.CDAudio.PlayStartingAtLba(audioStartLBA);
pce.CDAudio.EndLBA = audioEndLBA;
pce.CDAudio.PlayMode = CDAudio.PlaybackMode_CallbackOnCompletion;
break;
case 3: // Play normal
pce.CDAudio.PlayStartingAtLba(audioStartLBA);
pce.CDAudio.EndLBA = audioEndLBA;
pce.CDAudio.PlayMode = CDAudio.PlaybackMode_StopOnCompletion;
break;
}
SetStatusMessage(STATUS_GOOD, 0);
}
